What is a deep cleaning at the dentist?
Last updated September 3, 2026.
A deep cleaning removes hardened plaque and bacteria from below the gumline, where brushing cannot reach. The NHS describes early gum disease being managed with cleaning advice and hygienist care, while serious disease can need deep cleaning under the gums. The procedure scales tartar off the root surfaces and smooths the roots so the gum can tighten back against the tooth. It is done with local anaesthetic, often across two or more visits. Expect tender gums and sensitivity for a few days after. Gum disease is driven by plaque bacteria building up, so the deep clean is a reset, not a cure: interdental cleaning every day and regular hygienist reviews are what keep the pockets from coming back.
What to do
- Expect local anaesthetic and possibly two or more appointments, one section at a time.
- Plan for a few tender days: soft brushing, salt-water rinses, and paracetamol if needed.
- Use interdental brushes daily afterward; they clean where the disease lived.
- Stop smoking if you smoke; the NHS flags it as a key driver of gum disease.
- Keep the follow-up hygienist visits so pockets are re-measured and maintained.
Related questions
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